Langwith Colliery Clowne Seam rescue and firefighting plan marked as revised 29 March 1976. Gridded, scale 1:5000, with reference key in top left hand corner. At top, separate inset plans for High Main Seam, Clowme Seam, Main Bright and High Hazel Seam, scale 1:2500. Identified as being in National Coal Board North Derbyshire Area. Mar 1976